They still do, since in 5G you can capture a SUCI, replace it on a later connection attempt, and observe if the phone can still attach. See [1], section 5.2.3, and it‘s implemented in [2].

Finally, localization attacks could potentially still work as well.

[1] https://arxiv.org/pdf/1806.10360.pdf [2] https://dl.acm.org/doi/10.1145/3448300.3467826